Combined beam bridge deck slab and main beam connecting structure

Abstract

The utility model relates to combined beam bridge deck slab and main girder connecting structure technical field discloses a combined beam bridge deck slab and main girder connecting structure, including the main girder body, the top of main girder body is provided with the deck slab body, through the connecting component that sets up, the positioning rod and the positioning groove slide fit, realize the deck slab body and the main girder body preliminary positioning, reduce the installation alignment difficulty, improve construction efficiency, guarantee the connection position accurate, the butyl rubber strip in recess is extruded deformation when embedding the boss, fills the gap and forms the first sealing barrier, the expansion waterstop of boss outer wall meets the water expansion and blocks the leakage channel, and the waterproof performance is improved in double sealing, avoid moisture erosion, prolong the life, the deck slab body is connected with the main girder body through the second bolt, the boss is connected with the recess through the first bolt, and the double bolt connection makes the both combination close, and the load is transferred and the stress is even, improves the overall structure stability and the bearing capacity.

Description

Technical Field

[0001] This utility model relates to the technical field of connection structure between bridge deck and main beam of composite beam bridge, and particularly to a connection structure between bridge deck and main beam of composite beam bridge. Background Technology

[0002] The connection structure between the bridge deck and the main beam of a composite beam bridge is a key structure in bridge engineering to enable the bridge deck and the main beam to work together. Its design must take into account many aspects such as connection reliability, stress rationality, construction convenience and durability.

[0003] The applicant discovered a Chinese patent, "A Connection Structure Between the Bridge Deck and Main Beam of a Composite Beam Bridge," with publication number CN215482230U. This patent primarily involves creating a groove at the location of the shear connector on the upper surface of the main beam. This groove, together with the through-holes in the bridge deck, forms a grouting cavity. Post-cast concrete is then poured into this cavity, with the shear connector acting as reinforcement, forming an integrated connection structure. This allows the main beam and bridge deck to share the interface shear force and vertical pull-out force through the post-cast concrete and the shear connector, significantly enhancing the overall reliability and durability of the composite beam bridge deck and main beam. However, this patent relies solely on the density of the post-cast concrete for waterproofing, lacking a dedicated sealing structure. Furthermore, concrete may develop micro-cracks under temperature changes or loads, creating seepage channels. In actual use, water seepage can corrode the main beam, shear connectors, and reinforcing steel, leading to corrosion and reduced structural durability. Freeze-thaw cycles in winter can further exacerbate crack expansion, posing safety hazards. Therefore, we propose a connection structure between the bridge deck and main beam of a composite beam bridge. Utility Model Content

[0004] The purpose of this utility model is to provide a composite beam bridge deck and main beam connection structure to solve the problems mentioned in the background art, which rely solely on the density of the post-cast concrete itself for waterproofing, lacking a dedicated sealing structure. Furthermore, the concrete may develop micro-cracks under temperature changes or loads, becoming seepage channels. In actual use, water seeps in and corrodes the main beam body, shear connectors, and reinforcing bars, leading to corrosion and reduced structural durability. Freeze-thaw cycles in winter may also exacerbate crack expansion, causing safety hazards.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a composite beam bridge deck and main beam connection structure, comprising a main beam body, a bridge deck body disposed on the top of the main beam body, and a connecting component disposed inside the main beam body and at the bottom of the bridge deck body. The connecting component includes positioning rods, butyl rubber strips, a first bolt, and a second bolt. Four sets of positioning rods are provided, and all four sets of positioning rods are fixedly connected to the bottom of the bridge deck body. Four sets of positioning grooves are opened on the top of the main beam body, and the four sets of positioning rods are slidably connected to the interior of the four sets of positioning grooves. An expansion sealing strip is connected to the bridge deck body through a boss.

[0006] As a preferred embodiment, a groove is provided in the middle of the top of the main beam body, the butyl rubber strip is disposed inside the groove, and the boss is fixedly installed in the middle of the bottom of the bridge deck body.

[0007] As a preferred embodiment, a shallow groove is formed on the outer wall of the boss, the expansion waterstop strip is disposed inside the shallow groove, and the outer wall of the boss is slidably connected to the surface of the butyl rubber strip.

[0008] As a preferred embodiment, the bridge deck body is threadedly connected to the top of the main beam body by a second bolt, the boss is threadedly connected to the inside of the groove by a first bolt, and the bottom of the bridge deck body fits into the top of the main beam body.

[0009] As a preferred embodiment, an adjustable clamping device is provided on the side of the main beam body. The adjustable clamping device includes an L-shaped connecting plate and a lead screw. Two sets of L-shaped connecting plates are provided, and the two sets of L-shaped connecting plates are respectively fixedly installed on the left side and the right side of the main beam body. The surfaces of the two sets of L-shaped connecting plates are provided with sliding grooves.

[0010] As a preferred embodiment, the lead screw is provided in two sets. One end of each set of lead screws is rotatably connected to a baffle, and the other end of each set of lead screws is fixedly connected to a cross rod. The outer walls of the two sets of lead screws are threaded to the inner walls of the two sets of L-shaped connecting plates, and the bottoms of the two sets of baffles are slidably connected to the inside of the two sets of sliding grooves.

[0011] The technical effects and advantages of this utility model are as follows:

[0012] 1. Through the set connection components, the positioning rod and the positioning groove slide together to achieve the initial positioning of the bridge deck body and the main beam body, reduce the difficulty of installation alignment, improve construction efficiency, and ensure accurate connection position. The butyl rubber strip in the groove is squeezed and deformed when the boss is embedded, filling the gap to form the first sealing barrier. The expansion water-stop strip on the outer wall of the boss expands when it comes into contact with water to block the leakage channel. The double seal improves the waterproof performance, avoids water erosion, and extends the service life. The bridge deck body is connected to the main beam body by the second bolt, and the boss is connected to the groove by the first bolt. The double bolt connection makes the two tightly connected, which can transfer the load and distribute the force evenly, improving the overall structural stability and load-bearing capacity.

[0013] 2. With the adjustable clamping device, the operator can rotate the cross bar to drive the lead screw to drive the threaded transmission on the inner wall of the L-shaped connecting plate, so that the baffle slides along the slide groove and clamps the side of the bridge deck body. This structure can adjust the clamping force in real time according to the installation error or stress deformation of the bridge deck body, which can prevent the connection from loosening. At the same time, the symmetrical clamping on both sides can ensure the force balance of the bridge deck body. Working together with the connecting components, it can further enhance the lateral stability of the overall structure. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the overall disassembled structure of this utility model;

[0016] Figure 3 for Figure 2 Schematic diagram of the middle section;

[0017] Figure 4 This is a schematic diagram of the bottom view structure of the bridge deck body of this utility model;

[0018] Figure 5 This is a schematic diagram of the adjustable clamping device of this utility model.

[0019] In the diagram: 1. Main beam body; 2. Bridge deck body; 3. Connecting components; 301. Positioning rod; 302. Positioning groove; 303. Groove; 304. Butyl rubber strip; 305. Boss; 306. Expansion waterstop strip; 307. First bolt; 308. Second bolt; 4. Adjustable clamping device; 401. L-shaped connecting plate; 402. Slide groove; 403. Baffle; 404. Screw rod; 405. Cross rod. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see the appendix Figure 1 - Appendix Figure 4 A composite beam bridge deck and main beam connection structure includes a main beam body 1, a bridge deck body 2 on the top of the main beam body 1, and a connecting component 3 inside the main beam body 1 and at the bottom of the bridge deck body 2. The connecting component 3 includes positioning rods 301, butyl rubber strips 304, first bolts 307 and second bolts 308. Four sets of positioning rods 301 are provided, and all four sets of positioning rods 301 are fixedly connected to the bottom of the bridge deck body 2. Four sets of positioning grooves 302 are opened on the top of the main beam body 1, and the four sets of positioning rods 301 are slidably connected to the inside of the four sets of positioning grooves 302. An expansion waterstop strip 306 is connected to the bridge deck body 2 through a boss 305. A groove 303 is opened in the middle of the top of the main beam body 1, and the butyl rubber strip 304 is placed inside the groove 303. The boss 305 is fixedly installed in the middle of the bottom of the bridge deck body 2.

[0022] The positioning rod 301 is fixedly connected to the bottom of the bridge deck body 2. Through the sliding cooperation with the positioning groove 302, the bridge deck body 2 and the main beam body 1 are initially positioned to ensure the accuracy of the connection position. The positioning groove 302 is opened on the top of the main beam body 1 and cooperates with the positioning rod 301 to provide guidance and positioning for the installation of the bridge deck body 2, reducing the difficulty of installation alignment.

[0023] A shallow groove is provided on the outer wall of the boss 305, and an expansion waterstop strip 306 is set inside the shallow groove. The outer wall of the boss 305 is slidably connected to the surface of the butyl rubber strip 304. The bridge deck body 2 is threadedly connected to the top of the main beam body 1 by the second bolt 308. The boss 305 is threadedly connected to the inside of the groove 303 by the first bolt 307. The bottom of the bridge deck body 2 is in contact with the top of the main beam body 1.

[0024] The groove 303 is used to accommodate the butyl rubber strip 304 and the boss 305, providing space for their fit and enhancing the sealing of the connection. The butyl rubber strip 304 is located inside the groove 303. When the boss 305 is embedded in the groove 303, it will be squeezed and deformed, filling the gap between the boss 305 and the groove 303, forming the first sealing barrier to prevent moisture and other substances from seeping in.

[0025] Specifically, through the set connection component 3, the positioning rod 301 and the positioning groove 302 slide to achieve the initial positioning of the bridge deck body 2 and the main beam body 1, reducing the difficulty of installation alignment, improving construction efficiency, and ensuring accurate connection position. The butyl rubber strip 304 in the groove 303 is squeezed and deformed when the boss 305 is embedded, filling the gap to form the first sealing barrier. The expansion water-stop strip 306 on the outer wall of the boss 305 expands when it comes into contact with water to block the leakage channel. The double seal improves the waterproof performance, avoids water erosion, and extends the service life. The bridge deck body 2 is connected to the main beam body 1 by the second bolt 308, and the boss 305 is connected to the groove 303 by the first bolt 307. The double bolt connection makes the two tightly connected, transmits the load and distributes the force evenly, and improves the overall structural stability and load-bearing capacity.

[0026] Please see the appendix Figure 1 and appendix Figure 5 An adjustable clamping device 4 is provided on the side of the main beam body 1. The adjustable clamping device 4 includes an L-shaped connecting plate 401 and a screw rod 404. Two sets of L-shaped connecting plates 401 are provided. The two sets of L-shaped connecting plates 401 are fixedly installed on the left side and the right side of the main beam body 1, respectively. The surfaces of the two sets of L-shaped connecting plates 401 are provided with sliding grooves 402. Two sets of screw rods 404 are also provided. One end of the two sets of screw rods 404 is rotatably connected to a baffle 403. The other end of the two sets of screw rods 404 is fixedly connected to a cross rod 405. The outer walls of the two sets of screw rods 404 are threaded to the inner walls of the two sets of L-shaped connecting plates 401, and the bottoms of the two sets of baffles 403 are slidably connected to the inside of the two sets of sliding grooves 402.

[0027] The cross bar 405 is fixed to the other end of the lead screw 404, which makes it easy for the operator to rotate the lead screw 404 with tools, providing a convenient force application point for the rotation of the lead screw 404 and facilitating the adjustment of the working state of the clamping device.

[0028] Specifically, through the adjustable clamping device 4, the operator rotates the cross bar 405 to drive the lead screw 404 through the threaded transmission on the inner wall of the L-shaped connecting plate 401, so that the baffle 403 slides along the slide groove 402 and clamps the side of the bridge deck body 2. This structure adjusts the clamping force in real time according to the installation error or deformation of the bridge deck body 2 to avoid loosening of the connection. At the same time, the symmetrical clamping on both sides ensures the balance of force on the bridge deck body 2, and works in conjunction with the connecting component 3 to further enhance the lateral stability of the overall structure.

[0029] The working principle of this utility model is as follows: This utility model is a composite beam bridge deck and main beam connection structure. First, the workers lift the bridge deck body 2, aligning the four sets of positioning rods 301 at the bottom with the four sets of positioning grooves 302 at the top of the main beam body 1. The bridge deck body 2 is then slowly lowered, allowing the positioning rods 301 to slide along the positioning grooves 302, completing the initial positioning of the bridge deck body 2 and the main beam body 1. At this time, the protrusion 305 in the middle of the bottom of the bridge deck body 2 gradually approaches the groove 303 in the middle of the top of the main beam body 1. As the bridge deck body 2 continues to be lowered, the protrusion 305 is embedded in the groove 303, and the butyl rubber strip 304 in the groove 303 is squeezed and deformed, filling the gap between the protrusion 305 and the groove 303. At the same time, the expansion waterstop strip 30 in the shallow groove on the outer wall of the protrusion 305... 6 contacts the inner wall of the groove 303 to form a double sealing structure. Then, the workers use tools to pass the second bolt 308 through the bridge deck body 2 and screw it into the top of the main beam body 1, and pass the first bolt 307 through the boss 305 and screw it into the groove 303. The double bolt connection makes the bridge deck body 2 and the main beam body 1 tightly connected and the bottom fit together. Finally, the workers rotate the cross rods 405 on both sides of the main beam body 1, which drives the screw 404 to drive the threaded transmission on the inner wall of the L-shaped connecting plate 401, so that the baffle 403 slides along the slide groove 402 towards the side of the bridge deck body 2 until the baffle 403 clamps the bridge deck body 2. The clamping force is adjusted according to the installation error or the force condition to ensure that the bridge deck body 2 is balanced under force and works with the connecting component 3 to enhance the lateral stability of the overall structure.

[0030] Finally, it should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A composite beam bridge deck and main beam connection structure, comprising a main beam body (1), wherein a bridge deck body (2) is disposed on the top of the main beam body (1), characterized in that: The main beam body (1) and the bottom of the bridge deck body (2) are provided with a connecting component (3). The connecting component (3) includes a positioning rod (301), a butyl rubber strip (304), a first bolt (307) and a second bolt (308). There are four sets of positioning rods (301). All four sets of positioning rods (301) are fixedly connected to the bottom of the bridge deck body (2). The top of the main beam body (1) is provided with four sets of positioning grooves (302). The four sets of positioning rods (301) are slidably connected to the inside of the four sets of positioning grooves (302). The bridge deck body (2) is connected to an expansion waterstop strip (306) through a boss (305).

2. The composite beam bridge deck and main beam connection structure according to claim 1, characterized in that: The main beam body (1) has a groove (303) in the middle of its top, the butyl rubber strip (304) is set inside the groove (303), and the boss (305) is fixedly installed in the middle of the bottom of the bridge deck body (2).

3. The composite beam bridge deck and main beam connection structure according to claim 2, characterized in that: A shallow groove is provided on the outer wall of the boss (305), and the expansion waterstop strip (306) is disposed inside the shallow groove. The outer wall of the boss (305) is slidably connected to the surface of the butyl rubber strip (304).

4. The composite beam bridge deck and main beam connection structure according to claim 3, characterized in that: The bridge deck body (2) is threadedly connected to the top of the main beam body (1) by a second bolt (308), the boss (305) is threadedly connected to the inside of the groove (303) by a first bolt (307), and the bottom of the bridge deck body (2) is in contact with the top of the main beam body (1).

5. The composite beam bridge deck and main beam connection structure according to claim 4, characterized in that: An adjustable clamping device (4) is provided on the side of the main beam body (1). The adjustable clamping device (4) includes an L-shaped connecting plate (401) and a screw rod (404). Two sets of L-shaped connecting plates (401) are provided. The two sets of L-shaped connecting plates (401) are fixedly installed on the left side and the right side of the main beam body (1), respectively. The surfaces of the two sets of L-shaped connecting plates (401) are provided with sliding grooves (402).

6. The composite beam bridge deck and main beam connection structure according to claim 5, characterized in that: Two sets of lead screws (404) are provided. One end of each set of lead screws (404) is rotatably connected to a baffle (403), and the other end of each set of lead screws (404) is fixedly connected to a cross rod (405). The outer walls of the two sets of lead screws (404) are threaded to the inner walls of the two sets of L-shaped connecting plates (401), and the bottoms of the two sets of baffles (403) are slidably connected to the inside of the two sets of sliding grooves (402).

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